Home / 257,933.16-386,902.58-78,020.42

Finding the Fourth Proportional to 257,933.16, 386,902.58 and 78,020.42

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Solution

The fourth proportional to 257,933.16, 386,902.58 and 78,020.42 is: 117,031.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,933.16 : 386,902.58 = 78,020.42 : x
  2. Step 2: Convert to fraction form
    257,933.16/386,902.58 = 78,020.42/x
  3. Step 3: Cross multiply
    257,933.16x = 386,902.58 × 78,020.42
  4. Step 4: Simplify right side
    257,933.16x = 30,186,299,466.07
  5. Step 5: Solve for x
    x = 30,186,299,466.07/257,933.16
  6. Step 6: Final answer
    x = 117,031.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.